Index: test/unit/issue_relation_test.rb
===================================================================
--- test/unit/issue_relation_test.rb	(revision 8761)
+++ test/unit/issue_relation_test.rb	(working copy)
@@ -104,4 +104,38 @@
     assert !r.save
     assert_not_nil r.errors[:base]
   end
+  
+  def test_create_should_make_journal_entry
+    from = Issue.find(1)
+    to = Issue.find(2)
+    from_journals = from.journals.size
+    to_journals = to.journals.size
+
+    relation = IssueRelation.new :issue_from => from, :issue_to => to,
+                                 :relation_type => IssueRelation::TYPE_PRECEDES
+    assert relation.save
+    from.reload
+    to.reload
+    relation.reload
+
+    assert_equal from.journals.size, (from_journals + 1)
+    assert_equal to.journals.size, (to_journals + 1)
+  end
+
+  def test_delete_should_make_journal_entry
+    relation = issue_relations(:issue_relation_001)
+    id = relation.id
+    from = relation.issue_from
+    to   = relation.issue_to
+    from_journals = from.journals.size
+    to_journals   = to.journals.size
+
+    assert relation.destroy
+
+    from.reload
+    to.reload
+
+    assert_equal from.journals.size, (from_journals + 1)
+    assert_equal to.journals.size, (to_journals + 1)
+  end
 end
Index: test/unit/issue_test.rb
===================================================================
--- test/unit/issue_test.rb	(revision 8761)
+++ test/unit/issue_test.rb	(working copy)
@@ -641,7 +641,8 @@
     should "not create a journal" do
       copy = @issue.copy(:project_id => 3, :tracker_id => 2, :assigned_to_id => 3)
       copy.save!
-      assert_equal 0, copy.reload.journals.size
+      prev_journal_count = copy.journals.size
+      assert_equal prev_journal_count, copy.reload.journals.size
     end
 
     should "allow assigned_to changes" do
Index: app/helpers/issues_helper.rb
===================================================================
--- app/helpers/issues_helper.rb	(revision 8761)
+++ app/helpers/issues_helper.rb	(working copy)
@@ -236,7 +236,16 @@
       end
     when 'attachment'
       label = l(:label_attachment)
+	when 'relation'
+	  if detail.value && !detail.old_value
+	    value = link_to_issue(Issue.find(detail.value))
+	    label = l(detail.prop_key.to_sym)
+	  elsif detail.old_value && !detail.value
+	    old_value = link_to_issue(Issue.find(detail.old_value)) if detail.old_value
+        label = l(detail.prop_key.to_sym)
+      end
     end
+
     call_hook(:helper_issues_show_detail_after_setting,
               {:detail => detail, :label => label, :value => value, :old_value => old_value })
 
@@ -277,6 +286,8 @@
         end
       when 'attachment'
         l(:text_journal_added, :label => label, :value => value).html_safe
+      when 'relation'
+        l(:text_journal_added, :label => label, :value => value).html_safe
       end
     else
       l(:text_journal_deleted, :label => label, :old => old_value).html_safe
Index: app/models/issue_relation.rb
===================================================================
--- app/models/issue_relation.rb	(revision 8761)
+++ app/models/issue_relation.rb	(working copy)
@@ -45,7 +45,9 @@
 
   attr_protected :issue_from_id, :issue_to_id
 
-  before_save :handle_issue_order
+  before_save   :handle_issue_order
+  after_create  :create_journal_after_create
+  after_destroy :create_journal_after_delete
 
   def visible?(user=User.current)
     (issue_from.nil? || issue_from.visible?(user)) && (issue_to.nil? || issue_to.visible?(user))
@@ -140,4 +142,46 @@
       self.relation_type = TYPES[relation_type][:reverse]
     end
   end
+
+  # property = 'relation' 
+  # prop_key = <type-of-relation> Look keys of TYPES 
+  # old_value = nil
+  # value     = id-of-the-related-issue
+  def create_journal_after_create
+    journal = issue_from.init_journal(User.current)
+    journal.details << JournalDetail.new(:property => 'relation',
+                                         :prop_key => label_for(issue_from).to_s,
+                                         :value    => issue_to.id
+                                        )
+    journal.save
+
+    # issue-to
+    journal = issue_to.init_journal(User.current)
+    journal.details << JournalDetail.new(:property => 'relation',
+                                         :prop_key => label_for(issue_to).to_s,
+                                         :value    => issue_from.id
+                                        )
+    journal.save
+  end
+
+  # property = 'relation' 
+  # prop_key = <type-of-relation> Look keys of TYPES 
+  # old_value = id-of-the-related-issue
+  # value     = nil
+  def create_journal_after_delete
+    journal = issue_from.init_journal(User.current)
+	journal.details << JournalDetail.new(:property  => 'relation',
+	                                     :prop_key  => label_for(issue_from).to_s,
+                                         :old_value => issue_to.id
+                                        )
+	journal.save
+
+	# issue-to
+	journal = issue_to.init_journal(User.current)
+	journal.details << JournalDetail.new(:property  => 'relation',
+	                                     :prop_key  => label_for(issue_to).to_s,
+                                         :old_value => issue_from.id
+                                        )
+	journal.save
+  end
 end